createlang pltcl mydb fails...

The following happens:
bash-2.04$ createlang pltcl acs
ERROR:  Load of file /usr/lib/pgsql/pltcl.so failed: /usr/lib/pgsql/pltcl.so: undefined symbol: Tcl_CreateSlave
createlang: language installation failed

RH 7.1 with updates.
Postgresql 7.1.3-4 (rpms)
All the following RPM's installed:
postgresql-7.1.3-4.i386.rpm          postgresql-perl-7.1.3-4.i386.rpm
postgresql-contrib-7.1.3-4.i386.rpm  postgresql-python-7.1.3-4.i386.rpm
postgresql-devel-7.1.3-4.i386.rpm    postgresql-server-7.1.3-4.i386.rpm
postgresql-jdbc-7.1.3-4.i386.rpm     postgresql-tcl-7.1.3-4.i386.rpm
postgresql-libs-7.1.3-4.i386.rpm     postgresql-tk-7.1.3-4.i386.rpm
postgresql-odbc-7.1.3-4.i386.rpm

What am I missing/doing wrong?
Thanks,
-Hawke
MightyWords Inc.
www.mightywords.com
"The only thing I know is that I know nothing" - Socrates
I am enough of an artist to draw freely upon my imagination. Imagination
is more important than knowledge. Knowledge is limited. Imagination
encircles the world." - Albert Einstein
"All truth passes through 3 stages. First, it is ridiculed. Second, it
is violently opposed. Third, it is accepted as being self-evident."
--Arthur Schopenhauer
All the knowledge I possess everyone else can acquire, but my heart is
all my own." - Goethe